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Finding the Fourth Proportional to 15,574.50, 21,495.74 and 9,756.30

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Solution

The fourth proportional to 15,574.50, 21,495.74 and 9,756.30 is: 13,465.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,574.50 : 21,495.74 = 9,756.30 : x
  2. Step 2: Convert to fraction form
    15,574.50/21,495.74 = 9,756.30/x
  3. Step 3: Cross multiply
    15,574.50x = 21,495.74 × 9,756.30
  4. Step 4: Simplify right side
    15,574.50x = 209,718,888.16
  5. Step 5: Solve for x
    x = 209,718,888.16/15,574.50
  6. Step 6: Final answer
    x = 13,465.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.